Rotary valve for explosion-engines.



H. E. GOFFIN.

ROTARY VALVE FOR EXPLOSION ENGINES.

APPLICATION FILED MAY}, 1914.

"Patented Feb. 2, 1915.

' 2 SHEETS-SHEET 1.

ROTARY VALVE FOR EXPLOSION ENGINES.

IAPPLIOATION FILED MAY 4,1914. I

Llfififlfifi Patented Feb. 2, 1915.

I [AWE/V295 fig d1 amarii 0f]??? WM i. By

nation.

ROTARY VALVE FOR EXPLOSION-ENGINES.

Specification of Letters Patent.

Patented Feb. i915.

Application and m 4, mm. serial no. stance.

explosion engines of that type in which the y axis of rotation is coincident with the axis ot the cylinder. I It is the oiuect of the invention to obtain a more perfect seal; further. to protect the valve from the heat and pressure developed in the explosion chamber: and further, to obtain a construction which may be cheaply manufactured. easily assembled and is accessible for adjustment or repairs.

In the drawings :Figure l is a vertical central section through a portion of an cnginc cylinder to which my valvcds applied: Fig. 2 is a horizontal section thereof: and Fig. 3 is a vertical section at right angles to Fig. 1.

A isthe engine cylinder preferably pro vidcd with the usual water jacket. and B is a detachable Water jacketed head which is recessed to form the clearance space for the compressed explosive charge.

My improved rotary valve is of a cup form arranged with the recess in the head B and having-its axis of rotation coincident with the longitudinal axis of the cylinder.

As shown. C is a cylindrical portion of the valve which is united to the shaft or spindle D by a downward dished web por tion..E.- At the upper end of the spindle is a gear or other drive wheel F- and a hearing G preferably arranged approximatelyin the plane of said wheel holds said spindle improper alinement.

To protect the valve from the heat and pressure of the explosion chamber a cupshaped lining H is arranged within thecylindrical portion of the valve. This lining cup is provided with the outwardlyextending flange I which is preferably seated in a recess between. the cylinder A and .head B, thereby forming a gas-proof joint.

The flange 1 also overlaps the lower end of the valve and together with the. cylindrical portion of the lining and the outer cylindrical wall J of the head. forms an annular recess for receiving the cylindrical portion a of the valve. 'Lhe lining il is also centrally depressed at K in conformity to the depression in the web E of the valve, the lowest point being in lino with the axis.

L is an inlet port and M an outlet port in the lining H, which ports register with corresponding passages N and 0 formed in the cylinder head. There is also preferably a port P in the lining registering with a charrber Q for the spark plug. and the area. of this port P may be proportioned to partially or wholly balance the ports L and M. 1

R are ports formed in the cylindrical portion of the valve suitably positioned to register successively with the ports L M and P. there being preferably a plurality of said ports it on opposite sides of the valve so as to reduce the angular speed thereof.

To obtain proper lubrication and also to complete the seal of the valve. a suitable lubricant may be fed downward along the spindle and then distributed over the sur face of the valve by centrifugal action. Preferably the drive-wheel F is arranged in a recess S in the head B, which recess is filled with lubricant. From this recess a portion of the lubricant is fed downward along thespindle where it will collect in the pocket formed by the depressed por-- tions E and R of the valve and the. lining cup. This will insure scaling against leakage of the compressed gases about the spindie while centrifugal action will cause the oil to be thrown outward and to lubricate and seal the clearance space between the cylindrical portion of the valve and the adjacent cylindrical walls of the head and lining cup. Thus a gas-proof seal is maintained. while the fact that the ported. face of the valve is cylindrical insures equal wear in all portions thereof.

My improved valve con truction isapplicable either to single cylinder engines or to iuulti-cylinder engines. as shown in Fig. 2.

To facilitate the distribution of the lubricant suitable channels may be formed in the face of the valve or its contacting seat.

What I claim as my invention is; V

1. In an explosion engine, the combination with the cylinder of :1V recessed and ported head therefor, a cupped valve having its axis coincident with the axis of the cylinder and fitting Within said recess. and a cupped lining flanged at its lower end for protecting said cup valve from heat and pressure developed in the explosion chamber, said lining being ported in reg tration with the ports in said head and'saio valve being provided with a cooperating port.

2. In an explosion engine, thecombinationwith the cylinder anda detachable recessed head therefor, of an-inverted cupshaped lining fitting within the recess of said head and flanged to be clamped and sealed between the head and cylinder, said lining forming an annular recess betweenthe same and the inner wall of the head, and a valve arranged to rotate in said annular recess- 3. In an explosion engine, the combination with the cylinder,-of a recessed detachable head therefor, an inverted cup-shaped lining arranged within the recess of said head and having an outwardly-extending flange at its lower end clamped between the head and cylinder, and a valve having an annular portion fitting between said lining and head and having a web portion also between said cup and head, connecting with the central spindle or drive-shaft, said valve, lining and head being provided with coiiperating ports.

4;. In an explosion engine, the combination with the cylinder, of a detachable recessed head therefor, an inverted cup-shaped I lining fitting within the recess of said head and spaced tl' erefrom, the lower end of said lining being provided with an outwardlyextending flange clamped between said head and cylinder and the central portion of said cup being dished or centrally depressed, a cup valve fitting between said cup lining and said recessed head, said valve having its central portion depressed in correspondence fitting between said lining and head with its upper portion centrally depressed in correspondence to said lining, a spindle or drive shaft for said valve passing axially outward through said head, and rotary driving means mounted on said spindle.

6. In an explosion engine, the combinano tion with a cylinder, of a detachable recessed and Water-jacketed head, an inverted cup lining engaging said recess and provided at its lower end with an outwardlyextending flange clamped between said head and cylinder, the upper portion of said lining being comically depressed, a cup valve fitting between said lining and recessed head having its upper end conically depressed to conform to the shape of said lining, a spindle or drive-shaft passing axially out from the central portion of said valve, and a drive wheel mounted on said spindle.

In testimonv whereof I aflix my signature in presence of two witnesses.

HOWARD E. COFFIN.

) Witnesses:

LENA M. CABLE, ROY D. CLAPIN. 

